iOS 27 UISceneDelegate push notification deadline: What breaks and how to prepare

With the advent of iOS 27, Apple is enforcing a mandatory transition from the AppDelegate lifecycle to the UISceneDelegate lifecycle, a change that has been signaled since iOS 13. This shift will significantly impact app functionality, especially push notifications, as apps without scene support will crash on launch, preventing the acquisition of APNs tokens necessary for notification delivery. Developers using native UIKit, Flutter, or React Native must ensure their apps are updated to comply with this requirement by September 2026, when the final iOS 27 SDK is released. During this transition, developers are encouraged to reassess their notification strategies, considering multi-channel approaches to enhance communication resilience across platforms. Services like Courier can facilitate this by managing token lifecycle and offering multi-channel routing, ensuring notifications continue even amidst platform changes.

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